Kamito Kazehaya is the main protagonist of Seirei Tsukai no Blade Dance, a unique male elementalist, a former assassin, a master swordsman and the reincarnation of the Demon King. Three years ago, he disguised himself as a girl under the alias Ren Ashbell to participate in the Blade Dance. He won, but due to a certain event, he abandoned blade dancing for three years, until he was called by his acquaintance Greyworth Ciel Mais to attend the Areishia Spirit Academy. She wants him to become an elementalist again, because Ren Ashbell has reappeared, even though she and Kamito are supposed to be the same person.